Asteroids

2026SP2 help

Last update: 2026-09-21 13:00 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Amor

Perihelion (q)

1.041

Aphelion (Q)

1.675

Eccentricity (e)

0.234

Inclination (i)

17.3

deg

Orbit period (P)

577.9

Earth MOID

0.04292

U parameter

8.7

Next Earth close approach

Date

2045-09-16

Nominal distance (from Earth center)

0.10507

15718763

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-20

Observatory

University of Arizona Mt. Lemmon Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.357835

1-sigma variation

0.003494

Unit

Eccentricity (e)

Value

0.233514

1-sigma variation

0.001858

Unit

Inclination (i)

Value

17.2612

1-sigma variation

0.0754

Unit

Long. of Ascending Node (Ω)

Value

180.0816

1-sigma variation

0.0052

Unit

Arg. of Perihelion (ω)

Value

166.6290

1-sigma variation

0.0426

Unit

Mean Anomaly (M)

Value

67.04229

1-sigma variation

0.24907

Unit

Perihelion distance

Value

1.040761

1-sigma variation

Unit

Aphelion distance

Value

1.674909

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.665800

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.043709

1-sigma variation

Unit

MOID

Value

0.042917

1-sigma variation

Unit

Orbit Period

Value

577.9215

1-sigma variation

Unit

U parameter

Value

8.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.22060E-5	6.48971E-6	2.61898E-4	1.81975E-5	-8.46390E-5	-8.67152E-4
e	6.48971E-6	3.45131E-6	1.39008E-4	9.67142E-6	-4.60188E-5	-4.60447E-4
i	2.61898E-4	1.39008E-4	5.68685E-3	3.91544E-4	-1.52949E-3	-1.87758E-2
Ω	1.81975E-5	9.67142E-6	3.91544E-4	2.71488E-5	-1.21573E-4	-1.29554E-3
ω	-8.46390E-5	-4.60188E-5	-1.52949E-3	-1.21573E-4	1.81184E-3	5.28768E-3
M	-8.67152E-4	-4.60447E-4	-1.87758E-2	-1.29554E-3	5.28768E-3	6.20348E-2

Date of computation: 2026-09-21 13:00 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

26.049

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

16 - 40*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.538321

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-20.286596

Unit

Source

[2]

Last Observation

Value

2026-09-21.361246

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

20 (2)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2026SP2 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1969-09-09 19:23	> 1 mo	0.1975116	0.0152698	3.4998036
EARTH	1988-09-18 07:32	> 1 mo	0.0689503	0.0400884	2.1258472
EARTH	2007-09-21 12:57	> 1 w	0.0437227	0.0418637	0.1265047
EARTH	2026-09-20 23:38	7.3	0.0456145	0.0449415	0.0002243
EARTH	2045-09-16 04:25	> 1 w	0.1050734	0.0349947	0.4154454
MARS	2068-09-21 19:37	> 1 w	0.0091805	0.0036325	0.3783469
EARTH	2094-09-30 17:38	> 1 mo	0.1694156	0.0281488	3.0495674
EARTH	2113-09-29 20:18	> 1 mo	0.1369497	0.0329451	4.1391380

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
9.40552932	256.58030340	0.04291746	MINIMUM
166.90456299	53.92701614	0.69407717	SADDLE
353.54083478	57.17729170	2.03012597	SADDLE
179.84101742	243.72117465	2.67938883	MAXIMUM

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MOID Plots

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